PLCs were initially used to facilitate control issues with relays, because the use of relays involves a lot of space, plenty of wiring, troubleshooting in the event of a malfunction, and due to its mechanical short life. By integrating analogue to digital and digital-to-analog converter, analog control of this analogue processor is also possible.
With PLCs, you can do all the control work, from controlling the temperature of a small sensor to controlling the production process of a complex product or a nuclear power plant. The level of control ability of each PLC depends on the type of CPU used in it.

PLCs are very successful in doing simple things, but as the process becomes more complex and larger, controlling it will only have a precision and low speed CPU. To increase the speed, accuracy, and security of the system, it is possible to divide the work into a system that controlled the system by using multiple independent processors, each processor controlling a part of the entire work. So, it's possible to build a DCS control system by using multiple PLCs simultaneously and managing their performance for a process. DCS is the total connection of multiple PLCs, where their processors are networked and one computer manages the rest of the Network Manager.

If we consider all field-level sensors as nodes of a network and extend the network to the field, a fieldbus network will be created.

 

In a simple DCS system, the network is only at the management level but In the fieldbus system, FCS, any transmitter is a computer, that is, a separate BIOS and address.


The National Iranian Petrochemical Company has been using its field for the first time in the field of Bass, and BPC is one of the few fully fieldbased companies.
One of the advantages of using the fieldbus system is the separation of analog and digital controllers and linking them into software. This is similar to having two powerful PLCs together, one that controls analog parameters and the other controls only digital parameters.
Another advantage of the fieldbus is the simple configuration of the graphical and display environment (Monitoring) and the ability to use Windows features in that environment.
Other protocols, like Profibus, extend the network into the field, but in the fieldbus, the standard FOUNDATION protocol is used, and more than 200 equipment manufacturers follow it.
The purpose of the fieldbus is to reduce cabling volumes and reduce the hardware used for the control system. Increase the information received and sent from the transmitters. Also, the structure of strategy and control programs in the feedbacks is blocked (Function Block), which makes the implementation and configuration (configuration) of control matters very convenient.
It should be noted that in projects that do not have strong monitoring, the installation site or the damage to the cable bus, the location of the transceivers, and ... will cause noise in the information sent and received, and will be problematic. If the location of the transmitters that are the field is not set correctly, the bus line will have a lot of maze and the DCS cable consumption will also increase!
Fieldbus is now the most advanced and, at the same time, the most efficient control system, because it includes advanced control systems with useful software.

Ramona input/output modules are the first ever DCS modules made by this company, which are an alternative to the input/output modules of the Yokogawa DCS control system

The ability to communicate with upstream sections, FCS and HIS Yukagava is included for these modules, and all settings available in the IO section can also be defined in the Ramona modules.

ردیف General Features of Ramona Products
1 placing and removing the product at work time (Hot plug)
2 use analog and digital modules for redundancy (with other Ramona or Yokogava modules)
3 Response Rate Less than 1 second of the Redundant Module to the corresponding module defect
4 Compatibility of the size and power consumption of the Ramona modules with Yokogawa samples

 

RAMONA-R751 Module:

The RAMONA-R751 module, corresponding to the ADV151 series of Yokogawa modules.

Specification Model
Compatible with Yokogawa ADV151 EC4-251-R751-
32, Common every 16-channel Number of input channels
24 VDC Rated input voltage
16 to 27 VDC Input ON voltage
≤ 5 VDC Input OFF voltage
5mA/ channel Input current (@rated input)
35 VDC Maximum allowable input voltage

Between input signal & system: 2.5 KVDC, for 1 minute

Between commons: 1 KVDC, for 1 minute
Withstanding isolating voltage

Status input

Pushbutton input
Functions
0.4 kg Weight

Module RAMONA-S751:

The RAMONA-S751 module, corresponding to the ADV551 series of Yokogawa modules.
Specification Model
Compatible with Yokogawa ADV551 EC4-251-S751-
32, Common every 16-channel Number of output channels
24 VDC Rated applied voltage
24 VDC, 50 mA Load voltage
20.4 to 26.4 VDC External power supply voltage range
2 VDC Output ON voltage maximum value
Current sink Output format
100 mA/channel, 26.4 V Maximum load current

Between output signal & system: 2.5 KVDC, for 1 minute

Between commons: 1 KVDC, for 1 minute
Withstanding isolating voltage

Status output

Pulse width output

Time-proportioning output
Functions

0.2 kg

Weight

Module RAMONA-R759:

The RAMONA-R759 module, corresponding to the ADV159 module, comes from the series of CENTUM-ST Compatible Yukagava modules.

Specification Model
Compatible with Yokogawa ADV159 EC4-251-R759-
32 isolated channels Number of input channels

OFF signal 100 kΩ or more

ON signal 200 Ω or less

Minimum current value when contact is short-circuited: 1.25 mA
Contact input signal

OFF signal 4.5 to 25 V DC

ON signal ±1 V DC, 200 Ω or less
Voltage input signal
4.5 V DC, 20 mA or more Input contact rating

Status input

Pushbutton input
Functions
0.3 kg Weight

ماژول RAMONA-S759:

The RAMONA-S759 module, corresponding to the ADV559 module, comes from the series of Centum-ST Compatible Yokogawa modules.

Specification Model
Compatible with Yokogawa AAI135 EC4-251-A435-
8 isolated channels Number of input channels
4 to 20 mA Input signal

25 mA

Allowable input current
±16 μA Accuracy

21.6 V or more (at 20 mA)

26.4 V or less (at 0 mA)
Transmitter power supply

±16 μA/10 °C

Temperature drift

Between input signal & system: 500 VDC, for 1 minute

Between channels: 500 VDC, for 1 minute

Withstanding isolating voltage
0.2 kg Weight

Module RAMONA-E435:

The RAMONA-E435 module, corresponding to the AAI835 series of Yokogawa modules.
Specification Model
Compatible with Yokogawa AAI835 EC4-251-R751-

Input: 4 isolated channels

Output: 4 isolated channels
Number of I/O channels

Input: 4 to 20 mA

Output: 4 to 20 mA
I/O signal
25 mA Allowable input current
0 to 750 Ω Allowable load resistance

Input: ±16 μA

Output: ±48 μA
Accuracy

21.6 V or more (at 20 mA)

26.4 V or less (at 0 mA)
Transmitter power supply
±16 μA/10 °C Temperature drift

Between I/O signals & system: 500 VDC, for 1 minute

Between channels: 500 VDC, for 1 minute
Withstanding isolating voltage
0.3 kg Weight

Module RAMONA-A443:

The RAMONA-A443 module, corresponding to the AAI143 series of Yokogawa modules.
Specification Model
Compatible with Yokogawa AAI143 EC4-251-A443-
16 isolated channels Number of input channels
4 to 20 mA Input signal
24 mA Allowable input current
±16 μA Accuracy

21.6 V or more (at 20 mA)

26.4 V or less (at 0 mA)

(output current limit: 25 mA)
Transmitter power supply
For each channel by setting pin Setting of 2-wire or 4-wire transmitter

±16 μA/10 °C

Temperature drift
Between input signal & system: 1500 VDC, for 1 minute Withstanding isolating voltage
0.3 kg Weight

Module RAMONA-B443:

The RAMONA-B443 module, corresponding to the module AAI543 series of Yokogawa modules.
Specification Model
Compatible with Yokogawa AAI543 EC4-251-B443-
16 isolated channels Number of output channels
4 to 20 mA Ouput signal
0 to 750 Ω Allowable load resistance
±48 μA Accuracy
±16 μA/10 °C Temperature drift
Between output signal & system: 1500 VDC, for 1 minute Withstanding isolating voltage

0.3 kg

Weight

Module RAMONA-A441:

The RAMONA-A441 module, corresponding to the AAI141 series of Yokogawa modules.
Specification Model
Compatible with Yokogawa AAI141 EC4-251-A441-
16 non-isolated channels Number of input channels
4 to 20 mA Input signal
27 mA Allowable input current
±16 μA Accuracy

14.8 V or more (at 20 mA)

26.4 V or less (at 0 mA)

(output current limit: 27 mA)
Transmitter power supply
For each channel by setting pin Setting of 2-wire or 4-wire transmitter

±16 μA/10 °C

Temperature drift
0.3 kg Weight

Module RAMONA-E441:

The RAMONA-E441 module, corresponding to the AAI841 series of Yokogawa modules.
Specification Model
Compatible with Yokogawa AAI841 EC4-251-E441-

Input: 8 non-isolated channels

Output: 8 non-isolated channels
Number of I/O channels

Input: 4 to 20 mA

Output: 4 to 20 mA
I/O signal
25 mA Allowable input current
0 to 750 Ω Allowable load resistance

Input: ±16 μA

Output: ±48 μA
Accuracy

14.8 V or more (at 20 mA)

26.4 V or less (at 0 mA)

(output current limit: 25 mA)
Transmitter power supply

±16 μA/10 °C

Temperature drift
0.4 kg Weight

The executive team of modules consists of five teams of top engineering engineers who have high education in electrical engineering, electrical engineering control and computer engineering, as well as a background in the field of manufacturing, manufacturing and reverse engineering of electronic cards, He has managed to build more than 300 types of control and power electronic cards, and has stepped up the process of localization of this knowledge.
This unit is managed directly by the company's manager.


The organizational chart of this unit is as follows:

1. Design, construction and installation of Ramona I/O card series for use in South Pars Gas complex

 

Project  Replacement of input and output modules of YOKOGAWA I/O cards
Employer General Staff of the South Pars (SPGC)
Project duration 30 Month
Delivery Date 2016 Jun

 

South Pars Gas Complex SPGS